Unique bis-η5/η1 bonding in a dianionic germole.: Synthesis and structural characterization of the dilithium salt of the 2,3,4,5-tetraethyl germole dianion

被引：55

作者：

Choi, SB ^{[1
]}

Boudjouk, P ^{[1
]}

Hong, JH ^{[1
]}

机构：

[1] N Dakota State Univ, Dept Chem, Ctr Main Grp Chem, Fargo, ND 58105 USA

来源：

ORGANOMETALLICS | 1999年 / 18卷 / 15期

关键词：

D O I：

10.1021/om990241j

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of 1,1-dichloro-TEGeCp (TEGeCp = 2,3,4,5-tetraethyl-1-germacyclopentadiene) with excess Li in tetrahydrofuran (THF) at room;temperature gave [TEGeCp2-]. 2[Li+] quantitatively. X-ray structure determination of this germole dianion shows three Lithium cations around one germole ring in eta(1), eta(5), and eta(5) sites to give the composition [eta(5)-Li . TMEDA][eta(5)-Li](1/2)[eta(1)-Li](1/2)[Et4C4Ge] (TMEDA = N,N,N',N'-tetramethylethylenediamine). Nearly equal C-C bond distances in the Et4C4Ge ring indicate a delocalized pi-system. Reactions of this germole dianion with trimethylchlorosilane provided 1,1-bis(trimethylsilyl)-TEGeCp, in high yields.

引用

页码：2919 / 2921

页数：3

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